Effects of the modified expanded perlite materials on magnesium phosphate cement-based fireproof mortars: Mechanical property, thermal conductivity and microstructure
IF 6.5 2区 工程技术Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Chen Fang , Jing Wen , Ying Li , Lei Liu , Yang Shi , Yuchao Lyu , Baodong Xing , Jianming Yang
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引用次数: 0
Abstract
This paper focuses on the expanded perlite modifications and their effects on the properties of magnesium phosphate cement-based fireproof mortars. Silane impregnation solution, water glass, and stearic acid were employed for surface hydrophobicity modification of the expanded perlite particles. Eight types of the magnesium phosphate cement–based fireproof mortars were fabricated with and without various modified expanded perlite particles. The magnesium phosphate cement–based fireproof mortar morphology was characterized by a scanning electron microscope–energy–dispersive X–ray spectroscopy. The weight loss and chemical compositions of each magnesium phosphate cement–based fireproof mortar were visually analyzed by thermogravimetry and X–ray diffraction, respectively. Analysis reveals that the silane impregnation solution has a greater effect than stearic acid and water glass on the surface modification of the expanded perlite particles. The magnesium phosphate cement–based fireproof mortar prepared with the expanded perlite particles modified by the silane impregnation solution has better properties in terms of compressive strength and fire resistance than that by others, regardless of hydration age. In addition, the findings, in terms of mortar micrographs, thermogravimetry and chemical components, can contribute to explaining the differences observed in the performance of various magnesium phosphate cement–based fireproof mortars.
期刊介绍:
Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation).
The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.